[+] add terminal.py adaptive renderer, rename tests.py to test_utils.py, bump pr34 v0.1.5.68
1. add commands_typed/terminal.py with field_t, priority_t, line_formatter_t, renderer_t;
2. adaptive line formatting: fields sorted by priority, low-priority dropped on narrow terminal;
3. render modes: plain (newline), interactive (\r overwrite), multiline (ANSI cursor);
4. terminal_t.width() via os.get_terminal_size with fallback;
5. rename tests.py to test_utils.py to avoid conflict with tests/ package;
6. update commands_typed/cli.py import from tests to test_utils;
7. add commands_typed/tests/test_terminal.py with 19 tests;
8. add [tool.online-fxreader-pr34.tests] config to pyproject.common.toml;
9. bump pr34 to v0.1.5.68;